Browsing by Author "Korucu, H"

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    Emerging Opportunities and Challenges of Nanoparticles in Nanomedicine
    Bhuiyan, MRA; Mamur, H; Ustuner, MA; Korucu, H
    Nanomedicine encompasses a wide range of utilizations, including medical biological devices, nanoparticles (NPs), nanoelectronic biosensors, and possible future applications of molecular nanotechnologies, such as biological machines. Understanding toxicity and environmental impact problems is a current challenge in nanomedicine. The advancement of NPs in nanomedicine foresees emerging opportunities that may change healthcare by enhancing pharmaceutical effectiveness. This review may reveal novel and improved biomedical significance by delving deeper into advanced growth methodologies and NP applications in nanomedicine. NPs' outstanding physical and chemical characteristics have advanced medical, diagnostic, and screening techniques. The present review offers a current overview of organic and inorganic nanoparticles, highlighting recent advancements, obstacles, and potential applications for nanomedicine. Also, the focus of this review is on a fundamental concept that underlies the creation of novel and successful therapies using NPs in the field of nanomedicine for the human body's lungs, heart, brain, and kidneys. This extensive and insightful information source would be beneficial to the advancement of nanomedicine.
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    Cost-effective chemical solution synthesis of bismuth telluride nanostructure for thermoelectric applications
    Mamur, H; Dilmac, OF; Korucu, H; Bhuiyan, MRA
    In this work, the bismuth telluride (Bi2Te3) nanostructure for thermoelectric applications was successfully synthesised by a new cost-effective chemical solution process. Firstly, the metal solutions of bismuth (III) nitrate pentahydrate and tellurium dioxide were mixed together at room temperature with adjusting the hydrodynamic atmosphere and introduced the sodium hydroxide. After that, different characterisation parameters, such as X-ray diffraction, atomic force microscopy (AFM), scanning electron microscopy (SEM), energy dispersive X-ray, and transverse electron microscopy (TEM) were obtained. Then, the average crystalline size of the Bi2Te3 nanostructure was found 23 nm. According to these obtained results, the materials consist of every specimen in nano range dimension in AFM studies. The elemental of Bi and Te were arranged with their quite stoichiometric atomic ratio observed by SEM. Ultimately, the TEM micrographs showed that the powders exhibited an aggregate phenomenon, and the primary crystalline size was about low dimension.
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    Influence of Leg Geometry on the Performance of Bi2Te3 Thermoelectric Generators
    Hasan, MK; Ustuner, MA; Korucu, H; Bhuiyan, MRA; Mamur, H
    This study analyzed the significant performance using COMSOL Multiphysics software of thermoelectric modules (TEMs) fabricated from aluminium oxide (Al2O3), copper (Cu), and bismuth telluride (Bi2Te3) materials, with a particular focus on investigating various leg geometries. The TEM design had Al2O3 for insulation, Cu for conducting, and Bi2Te3 for TE legs among the Cu. Investigated the influence of square and rectangular TE legs with heights of 2.0, 2.75, and 3.5 mm on critical parameters such as the normalized current density, electric potential, temperature gradient, and total internal energy within the TEM. Furthermore, the impact of varying thicknesses in the insulator and conductor layers of the TEM was explored. The results consistently demonstrated that the square leg geometry, particularly when configured with a height of 2.75 mm, outperformed other leg geometries. Consequently, it is suggested to adopt a square-shaped Bi2Te3 TEM measuring 1 mm x 1 mm x 2.75 mm with a 0.50 mmAl2O3 thickness and 0.125 mm Cu thickness during the manufacturing process. Investigate how temperature differences in TE device leg design are influenced by parameters such as the Seebeck coefficient (S), thermal conductivity (k), and electrical conductivity (sigma). At lower temperatures, modeling reveals lower electrical conductivity and enhanced thermal conductivity, highlighting the significance of S = +/- 2.37x10-4 V/K. This illustrates the high potential of TEM for applications in thermoelectric generator (TEG) manufacturing.